Movies? Life and death sniper? Tennessee's gun expert, the old man, took out his book from the shelf and looked at it. What is the "wrapping paper method"? hero

In fact, this is unrealistic. The warhead engages with the male line of the rifling. After the ammunition is fired, the rifling makes the warhead rotate at a high speed, which makes the accuracy of the warhead high and the warhead will not roll in the air. But the huge friction between the rifling and the warhead will produce high temperature, and the paper will definitely burn, so this is unrealistic. It is true that the rifling marks of any barrel will not be the same as others.